The monumental Bibliographic and Faunal Index of Paleozoic Pelmatozoan Echinoderms was initially conceived and data compilation started by Frank Springer, who died in 1927. Some of the tabulation of data was done by his daughter, Ada Springer Davis, and the bibliography was subsequently completed and published as Bibliographic and Faunal Index of Paleozoic Pelmatozoan Echinoderms, by Bassler and Moodey, in 1943. This tome consisted of a bibliographic and faunal index, as well as a systematic revision of the generic allocations of many species, although no supporting reasons for any of the changes were given. The uncounted hours of tedious literature searching which have been saved by investigators of Paleozoic echinoderms who referred to Bassler and Moodey’s volume will remain known only to those investigators.
The bibliography for this compilation includes 488 references spanning the period 1938 through 1968 and one reference for 1930. Much of the literature for 1938 through 1942 was included in Bassler and Moodey’s work (1943). Most of the papers for 1938 through 1942 not indexed by Bassler and Moodey were papers published outside North America. Due to the political conditions preceding and at the beginning of World War II they probably were not received by the authors in time to be included.
A study of the number of references for each year shows the expected over-all increase in number of papers published each year. From 1943 through 1949 there is an average of 14 papers per year (Fig. 1), for 1950 through 1959 the average is. . .